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ipn [44]
3 years ago
10

30 POINTS. OLD QUESTION. SCIENTIFIC NOTATION.

Mathematics
1 answer:
11111nata11111 [884]3 years ago
5 0

Answer:

  • Dylan  is correct

Step-by-step explanation:

<u>Sylvia</u>

  • Incorrect second step

<u>Dylan  </u>

  • Correct both steps

<u>Ethan</u>

  • Incorrect first step
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What is the vertex of the graph of f(x) = x2 + 10x - 9? A) (-5, -34) B) (-5, -9) C) (5, -9) D) (5, 66)
sukhopar [10]

Answer:

A) (-5, -34)

Step-by-step explanation:

f(x) = x^2 + 10x - 9

We complete the square to get the equation in vertex form

Take the coefficient of the x term and divide by 2 then square it.  We add it and then subtract it not to change the value of the equation

f(x) = x^2 + 10x +(10/2)^2 - (10/2)^2 - 9

f(x) = x^2 +10x +25 -25 -9

f(x) = (x^2 +10x +25) -34

The term in parentheses simplified to (x+10/2) ^2

     = (x+5)^2 -34

   = (x - -5)^2 -34

This is in the form (x-h)^2 +k

The vertex is (h,k)  h=-5 and k=-34

(-5,-34)

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3 years ago
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mojhsa [17]

Step-by-step explanation:

here,

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15°+41°=5x°-x°

56°=4x°

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Answer:

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Step-by-step explanation:

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Do 6•6=36
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3 years ago
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